Comments or suggestions regarding
figures are encouraged. Please send comments to the e-mail address given below.
We reserve the right to adjust the data represented in these figures based on
recalibrations of reference gases and instruments. These figures may be updated at any
time.
- CCGG Air Sampling Network
World map showing the current NOAA CMDL Carbon Cycle-Greenhouse Gases Measurement
Programs.
- CO2 Monthly Means
Atmospheric carbon dioxide monthly mean mixing ratios determined from the continuous
monitoring programs at the four NOAA CMDL baseline observatories.
- Mauna Loa CO2 Monthly Means
Mauna Loa monthly mean carbon dioxide mixing ratios from 1958 through 1997 determined
from in situ measurements. Data prior to May 1974 are from the Scripps Institution of
Oceanography, data since May 1974 are from NOAA CMDL.
- CO2 Rug
Three dimensional representation of the latitudinal distribution of atmospheric carbon
dioxide in the marine boundary layer for the period 1988 through 1997. Data from the NOAA
CMDL cooperative air sampling network were used. The surface represents data smoothed in
time and latitude.
- CH4 Rug
Three dimensional representation of the latitudinal distribution of atmospheric methane
in the marine boundary layer for the period 1988 through 1997. Data from the NOAA CMDL
cooperative air sampling network were used. The surface represents data smoothed in time
and latitude.
- CO Rug
Three dimensional representation of the latitudinal distribution of atmospheric carbon
monoxide in the marine boundary layer for the period 1993 through 1997. Data from the NOAA
CMDL cooperative air sampling network were used. The surface represents data smoothed in
time and latitude.
- C13 in CO2 Rug
Three dimensional representation of the latitudinal distribution of the carbon isotopic
composition of atmospheric carbon dioxide in the marine boundary layer for the period 1994
through 1997. The measurements of stable isotope ratios were made at the University of
Colorado INSTAAR, using air samples provided by the NOAA CMDL cooperative air sampling
network. The surface represents data smoothed in time and latitude.
- CO2 Trends and Growth Rates
Global average atmospheric carbon dioxide mixing ratios and long- term trend determined
using measurements from the NOAA CMDL cooperative air sampling network. Also shown is the
global average growth rate for carbon dioxide.
- CH4 Trends and Growth Rates
Global average atmospheric methane mixing ratios and long-term trend determined using
measurements from the NOAA CMDL cooperative air sampling network. Also shown is the
globally averaged growth rate for methane.
- CO Trends and Growth Rates
Global average atmospheric carbon monoxide mixing ratios and long- term trend
determined using measurements from the NOAA CMDL cooperative air sampling network. Also
shown is the global average growth rate for carbon monoxide.
- CO2 and CH4 Growth Rate Contours
Contour plots showing temporal and spatial (latitude) variations in the atmospheric
increases of carbon dioxide and methane derived from measurements of samples collected at
the NOAA CMDL cooperative air sampling network sites.
- Isotopes of Carbon Dioxide
Times series showing the relationships between atmospheric carbon dioxide and carbon-13
and oxygen-18 isotopic composition in the marine boundary layer. Data for Samoa and Barrow
are shown.
- Vertical Profiles
A typical vertical profile of the three major carbon cycle trace gases taken over Carr,
Colorado.
When using these figures, please acknowledge the
National Oceanic and Atmospheric Administration (NOAA), Climate Monitoring and Diagnostics
Laboratory (CMDL), Carbon Cycle-Greenhouse Gases. 
